Large-size bus body key dimension detection system solving scheme based on multi-view vision

Abstract

The invention relates to the field of machine vision, and relates to a large-size bus body key dimension detection system solving scheme based on multi-view vision. According to a detection system, coordinate systems of a plurality of vision detection subsystems are unified by using a laser tracker and a fusion transformation matrix Hi algorithm, then coordinate systems which are established by fusing binocular CCD (Charge Coupled Device) camera detection subsystems into the laser tracker are global coordinate systems, and then calibration and detection precision of the detection system is ensured. Key point spatial coordinate information is acquired by using a plurality of the binocular CCD camera detection subsystems, and measurement module information such as the bus body width, the length, the diagonal difference, the pillow beam hole position degree, the bus body main beam equal altitude and the diagonal different of doors on two sides can be obtained through related algorithms. By adopting the system, the number of the binocular CCD camera detection subsystems can be rapidly increased and reduced along with variation of bus models according to actual detection requirements. The system has the advantages of being high in on-site adaptability, wide in measurement range and rich in detection item.

Description

Technical field [0001] The invention relates to a solution for a detection system for key dimensions of a large passenger car body based on multi-eye vision, and belongs to the field of machine vision. Background technique [0002] At present, with the continuous development of my country's transportation manufacturing industry, it is aimed at the actual situation of the scene such as large-scale rail passenger car models with many changes, many inspection items, and large inspection ranges. Enterprises often rely on traditional measuring tools, such as steel rulers, tape measures, and disk rulers, which cause large measurement accuracy and comprehensive errors, which cannot meet the detection accuracy requirements of key dimensions of large passenger car bodies. Coordinate machine measuring system, i-GPS detection system, laser tracker or joint measuring arm are limited by the small measuring range or the detection blind zone, so it is impossible to carry out the online detectio...

AI Technical Summary

Problems solved by technology

Enterprises often rely on traditional measuring tools, such as steel rulers, tape measures, pan rulers, etc., resulting in large measurement accuracy and comprehensive errors, which cannot meet the detection accuracy requirements for the shape and position tolerances of key dimensions of large bus bodies. The three-coordinate machine measurement system, i-GPS detection system, laser tracker or joint measurement arm cannot carry out online detection of key dimensions of large bus bodies due to the small measurement range or the existence of detection blind spots.

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